Combinations can also be entered manually using the Combinations > Custom… command. The same procedure outlined in Section 3.9.1 applies to this dialogue. Load combinations are entered manually by the user in the Load Combinations section by clicking in an empty row in the Load Combinations column and entering the algebraic formula for the combination using the Load Case symbols. The user then clicks in the Click to Validate column of the respective row in order to verify that there are no errors in the entered formula. A green light will appear if a valid combination has been entered. A yellow light will appear if a combination has been entered in which the analysis results of one of the load cases are not available. A red light will appear if the entered combination contains a syntax error. For more details on the Load Combination Generator, see the Load Combination Generator manual.